OpenPattern is a python library consisting of a set of classes designed to draft 1:1 scale bespoke sewing patterns and save them as pdf (or matplotlib compatible) files for printing or further processing.
Printing can be performed at fullscale on a tracer but OpenPattern can also cut the pattern in as many pieces as needed in order to print them on an A4 printer at home.
OpenPattern can be used to draft patterns from scratch but also includes a set of predefined patterns from bases such as bodices to more elaborate patterns such as shirts. The patterns are drafted following instructions from three main stylists: Jacqueline Chiappetta, Theresa Gilewska and Antonnio Donnano . Sizes are stored in a sqlite3 database. By default they include a series of standard (French and Italian) sizes for Women, Men, Girls and Boys given by these authors.
OpenPattern requires the following libraries to work properly.
- matplotlib
- numpy
- scipy
- json
- sqlite3
The last two are embedded in the standard library so you do not need to install them. If you want to access the measurements database from the terminal or some GUI you'll have to install the sqlite3 engine
To install the library you must first
- clone the directory somewhere on your computer
- open a terminal in the root directory
- run
python3 setup.py install. sudo rights may be needed depending on your computer configuration.
OpenPattern comes with an sqlite3 measurements.db database. This base contains a set of standard French and Italian sizes.
In order to be able to add your own measurements to this database you need to change its permissions.
On linux machines the database is stored in your .cache directory
cd ~/.cache/Python-Eggs/OpenPattern-0.2.0-py3.11.egg-tmp/OpenPattern/data
chmod 666 measurements.dbThe most simple way to use OpenPattern is to take advantage one of its predefined patterns. In the example script we plot the bodice of a women size 36 (French) with bust and waist darts.
import matplotlib.pyplot as plt
import OpenPattern as OP
# Create instance of base class
p = OP.Basic_Bodice(pname = "W36G", gender = 'w', style = 'Gilewska')
# Add darts
p.add_bust_dart()
p.add_waist_dart()
# Call the draw method
p.draw({"Pattern":"Bodice with darts"},save=True)
# Look at the result
plt.show()The result looks like
for more informations on the use of the library see the Documentation on read the docs.
For an introduction in French see OpenPattern_F.md in the fdoc section.
typical samples of scripts and patterns can be found in the sampleScripts and samplePatterns section in the docs.